Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aaec78da074c1f3…

MALICIOUS

PDF

86.8 KB Created: 2021-07-29 17:35:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c603fe3ffc28261723bf5a74b60baeaa SHA-1: a1d77d4327e52cd088537059efc5df131c5303a7 SHA-256: 0aaec78da074c1f31ea7f2a0bb07ad087e7bc74f3f497bfe6a648fdec691bece
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, many of which are hosted on compromised CMS platforms or disposable domains. The primary goal appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bbgpiti.com/userfiles/files/xidarutimunomazoxalep.pdf In PDF document text
    • http://anoh.net/pds/userfiles/files/dukudawusukuwugetes.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/83963404222.pdfIn PDF document text
    • https://hsse.cl/files/70096771416.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718c011b675---76971191394.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/15581789493.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/20d1a9596675d39bd02499eff42142c4/91824782659.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16096bdab7cd9f---76578089693.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/66916394228.pdfIn PDF document text
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/93292419178.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/joduzuwedutokasojimujaxuk.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/58941528454.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/6223aef45dae935f3cb13ada02481b13/terimew.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d11bba536d---musazumutadevejewamose.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609201afc9d4c---novume.pdfIn PDF document text
    • https://lasanisports.com/files/sosunuzuxidenis.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/jilelefepewezomusidaw.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/2qndls0an8tf7p62bf7kq5icts/82857107439.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/f911cd4354d5a9af59162a37b34b850a/9103386946.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/42384250165.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/98367915107.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/447feb41d9fcc08cfb8493736fd01fea/39348903714.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f739abf85---goligof.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/2f1ec29fa1fd7d1a35e51dcad00a8cb7/111630407.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/28504086088.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=unblock+restricted+calls+on+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 10604 bytes
SHA-256: d2a25440b89bf63f3f91e9fa7194ac37a0153a93c4b201a59d8e4438a20c2df1
font_01_sfnt_off0001061d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2F 17904 bytes
SHA-256: a9ac1632ba22a600f8ed7917602baba63ac87893a75d6f73c6596d0e039bf671

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